There is a small fee for samples shipped in the continental U.S. This can range from $10-$75.
Products shipped outside the continental U.S. can be subject to certain restrictions. Freight charges may range from $75-$300.

Black Oxide

EPi has researched and developed black oxide processes for over 60 years.

EPi’s lab research has resulted in EPi leading the way in black oxide when it became the first black oxide chemistry supplier to develop three processes of black oxide chemistry:

Hot Black Oxide - 285°F - Ultra-Blak 400

Mid Temperature Black Oxide - 225°F – Kool-Blak 225

Room Temperature Black Oxide - 70°-80°F – Insta-Blak 333

Any of EPi’s black oxide processes can be used in-house saving finishing costs, cutting lead time and increasing productivity. EPi’s black oxide processes are perfect for Lean Manufacturing companies.

Is your present black oxide process resulting in a smutty finish?Switch to one of EPi’s black oxide processes to eliminate common smut problems with other room temperature black and mid temperature black oxides.

1. Dimensional Stability: Blackening process produces essentially no dimensional change with only 5 to 10 millionths of an inch added to the dimension, which means the blackened parts retain their surface properties with polished surfaces retaining their gloss and heat-treated parts retaining their Rockwell hardness. Tool integrity is preserved and critically sized parts can be finished with no worries.

2. Anti-Galling: When it's necessary to break-in mating parts, the anti-galling surface sacrifices the lubricating layer of black during initial contact and abrasion while a work-hardened surface is formed.

3.Pleasing Esthetic Appeal: Produces a pleasing decorative black finish which enhances the perceived quality of the part, improving the stability of the part.

EPi provides superior solutions for blackening for steel, but also has quality, efficient, innovative solutions for a variety of other metals. For more information on any of these metals, click the link below: